Type-writing machine.



No. 818,569. PATENTED APR. 24, 1906. A. W. SMITH.

TYPE WRITING MACHINE.

APPLIOATION FILED MAY 10, 1902.

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HIE AT TURNS! PATENT ARTHUR W. SMlTH, OF JFi-RSEY ClTY, NEW JERSEY,ASSIGHQR TG T5651 WRITING MACHINE COMPANY, OF ILION, NEW YORK, A GOBPGMATron or rurw rosin Specification of Letters Patent.

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Patented A. ril 534: 1956.

Original application filed December 11, 1901, Serial No. 85,451. Dividedand this: application filed May 10,1902. Serial llo. 1 96.693.

To all whom it may concern:

Be it known that l, ARTHUR W. SMITH, a citizen of the United States, anda resident of Jersey City, in the county of Hudson and State or NewJersey, have invented certain new and useful Improvements inType-Writing Machines, of which the following 1s aspecification. i 7

My present application is adivisioh oi my;

. and detached from their stems or carriers and wherein there is littleliabilit of the keyhead being accidentally turns displaced,

v or detached in use.

A further object of my invention is to provide a simple, cheap, andcfiicient key-head structure wherein a smooth and resilient.

touch is aiiorded and a strong and reliable 2 5 head is prov idcd andone in which there is no liability of the characters on the head beingworn or rubbed off.

To the above and other ends which will hereinafter appear my inventionconsists in 0 the construction, arran ement, and combination of parts tobe hereinafter described and claimed.

In the accompan ing drawings, which illustrate one form of ey head andstem em bodying my invention, Figure 1 is a detail side View of the keystem and head. Fig. 2 is afront view of the same, partly in section,this view being taken at right angles to the positions indicated inFig. 1. Fig. 3 is a perspective View of the stem with the head detached.Fig. 4 is a dsta to View of the bottom cup of the key-head. ig. 5 is ades tailfbottom View of the key-head entire. Fig. 6 is a top view-of thesame with parts .5 broken away.

In the accompanying drawings like refer-- ence characters indicatecorresponding parts in the various views. v Each'of the lates '1 of thekey-stem is preferably made of sprin metal and is resilicnt at its upperand, the p ates con-acct edhyrivets l and they incd spacedaparthywashsrs i is bent laterally at 2, so as to provide an outwardly-sxtending lug or clip section. The said lugs are passed throughan angular opening 3 in the base of the key-head i and form aninterlocking connection therewith, as shown in Fig. 2. From aninspection of Figs. 3 and 5 it will be observed that the angular lugs 40on the key-stem are of less ore than the plates 1, so as to providehearing-- shoulders 5 on the plates against which the head is ada ted torest and on which it is supported. T c upper free cnds of the connect--5 ed plates 1 have a normal spring tension from each other, and in orderto attach the head to its stem it is merely necessary to com press theupper ends of the spring plates i and slip the head over the lugs 2 byinserting 1. them within; the opening 3 in the base, shown in Fig. 2.The pressure on the plat-cs may then be removed, thereby permittingresiliency of the plates to bring about an 111-- terlocldng of the lugs2 with the head to unite the key stem and head. By this ocnstruction theattachment and detachment of'the key buttons or heads may be readily andquickl effected, and when the parts are connested together it isimpossible for ahead to become accidentally detached or lostor even toturn axially or to become displaced on its stem, and thereby throw thecharacter in or on the head out of 'alinement with adjacent characters.Each key-head l is preferably fOP'l two oppositely -disposed metalliccup sections 6 and 7, fitting one within the ct and the formerconstituting the head and latter the bottom of the. key-head. cup-likesection 6 is concsved, as inmost .1 at 8,'and is first covered witha'fahric 9, so. 11' as paper, on which is printed the letter or othertype indicating character 10. The paper is then covered with a layer orof o transparent celluloid 1.1, which acts as prctectivc covering forthe printed charac and enables the keys to be cleaned will withoutliability of spoiling the character. a

. The variousparts of the hey-head may he so secured together byturning. in the edges 12 of the paper and. celluloid coveringwitlnn theinvrtsd top cap 6 and then inserting the bottom cup so that the turneddnportion 12 will lie between the walls or sides or c two cup. The partsthus assemhied void of. rims or ridges is presented to the touch of theoperator and that none of the preferably submitted to the action ofdies, which squeeze orcompress the sides and thereby secure tli paperand celluloid to the head and firmly nite the two cup-like sectionstogether. The finishing dies preferably cause the side wall or flange oithe outer cup to taper downwardly and inwardly, so as to effect a' moretenacious and permanent union of the parts. I

From an ins ection of Fig. 2 it will be understood that y reason of theconcavity in the top of the head the tightly-stretched coverings bridgethe head and contact therewith on its upper side onl at the rim orperimeter,"

thus providing the esideratum of a resilient or cushioned key-head forthe finger to strike.

Frorirthe foregoing description it will likewise .be'understood that thecelluloid covers the entire top and sides of the hollow keyhead and thata smooth seamless surface-demetallic parts are exposed for contact withthe fingers. Furthermore, it will be seen that there are no jointspresented at the sides or top of the key-head and that a cheap,dusrable, smooth, and resilient key-head is provided which can bereadily connected'to or disconnected from the key-stem, key-lever, orother part which carries it.

It will be perceived that the lugs 2 constitute, in efiect,spring-actuated latches and that these latches positively lock the headin osition on the stem, so that it cannot be pulled off without firstbending the springplates 1 together.

Having described my invention, what I claim as new, and desire to secureby Letters Patent, isv 1. In a type-writing machine, the combination ofa hollow key-head having an open ing in the base thereof, and a key-stemcomprising resilient members having engaging means that'are adapted tobe removabl serted in the said opening in the key-ii and to engage thekey-head and the walls of said opening to (positively lock the key-headto. the stem an to prevent the head from turning on the stem.

.2. In a t e-writing machine, the combination of a ollow key-head havingan opening in the base thereof, and a key-stem comprisin resilientmembers having bearingshoul ers against which the base of the head bearsto support the head in place and having enga ing means that-are adaptedto be removab yinserted in the'said o ening in the key-head and toengage the keyead and the walls of said opening to positively lock thekey-head to the stem and to prevent the head from turning on the stem.

3. In a t e-wntmg machine, the combi "p nation of a ollow removablekey-head, having an opening formedtherein and akey-stem comprismg a pairof independent resilient head, resilient supports havin plates securedtogether, each having an outwardly-projecting lug, which lugs projectinto the opening in the head and engage and positively interlock thereinto secure the ead to the key-stem and positively prevent the head fromturning on the stem, said lugs being maintained in en agement by theresiliency of the plates an affording a removal of the head b a movementof said plates to- Ward each ot er.

4. In a type-writing machine, the combi-- nation of a removable hollowkey-head, a rigid engaging portion forming part of said lateral clipmembers, which positively inter ock with the engaging portion of thekey-head and positively prevent it from turning thereon and which enablethe head. to .be removed.

5. In a type-writing machine, the combination of a removablehollowkey-head having an engaging member formed as apart thereof, and akey-stem comprising separate suitably-united resilient plates, eachhaving a projecting lug that is adapted to enter the hollow key-head andengage the engaging member ol said head and to be inaintained inpositive engagement by the resiliency of the lates so as to positivelyprevent t e keyead from turning on the stem and to afford the remova lof the headby a'relative movement of said plates.

6. In at pe-writing machine, the combination of a ollow key-head havingan an lar engaging opening in the base thereo a key-stem to which saidhe'adis removably connected, said stem comprising resilientlng means onsaid plates that coplates, enga the walls of the angular 0 enoperate witIOO ing in' the base of the'key-head and w 'ch 2 positively lock thehead to the stem.

7. The combination of a key-head for typewriting machines, comprising atwo -'part' metallic body portion, t e .upper section of which isconcaved, and a resilient cover which extends over the concaved portionand over the entire upper surface and edges of the head and is securedin place between, the two metallic parts that constitute the body of theI head, and a key-stem to which said head is detachably secured.

8. The combination of Writing machines, comprising two opposi disposedmetallic cup-like ,sectionsgthe uppermost section being conca'ved ontop, a paper disk having a type character thereon and a celluloid cover,the disk andthe eover being arranged to bridge said concavity and beingsecured'in place between said metallicicuplike sections, and a key-stemvto which said head is detachably secured.

9. The combination, of a rising two metallic'cup-like sections, one ofwhich is entirely covered with a sheet of celluloid, so as to present akey-head having a seamless coveringof celluloid at its top and akeyliead fort et el key-head comsides which celluloid sheet is securedbetween the two metallic sections and held in place by the pressurewhich unites the said sections, and a key-stem to which said head isdetachably secured.

10. The combination of a key-head comprising two oppositely-dis osedmetallic cuplike sections, the top one 0 which is concaved and isentirely covered with a sheet of celluloid so as to present a key-headhaving a seamless coverin of celluloid at its top and sides, which celluloid sheet is secured be tween the two metallic sections and held inplace by the pressure which unites the said sections, so that thecelluloid is stretched across the concaved portion of the head to form aresilient contact portion for the finger and a fabric having a characterthereon located beneath said celluloid sheet, and a keystem to whichsaid head is detachably secured.

11. In a type-writing machine, the combination of a hollow key-headcomprising a two-part metallic body ortion, the upper part or section ofwhich is concaved, and a resilient covering which extends over theconcaved portion and over the entire surface and edges of the head andis secured between the two metallic parts that constitute the body ofthe head, said head having an opening in the base thereof, and akey-stem comprising resilient members having engaging means that areadapted to be inserted in the said opening in the key-head andpositively engage the key-head and the Walls ofsaid opening, toremovably secure the key-head to the stem and to prevent the head fromturning on the stem.

12; In a type-writing machine, the combination of a hollow key-headcomprising two oppositely-disposed metallic cup -.like sectrons, theuppermost section being concaved on top, a paper disk having a typecharacter thereon and a celluloid cover, the disk and the'coverbeingarranged to bridge said concavity andbeing secured in place between saidmetallic cup-like sections, said key-head having an opening in the basethereof and a key-stern comprismg'resilient members havprising twocup-like sheet-metal parts, and a 1 key-sten1 to which said key-head isdirectly and detachably secured.

14. The combination of a hollow key-head comprising twooppositely-disposed cup-like sheet-metal parts secured together; and akey-stem to which said key-head is directly and detachably secured.

15. The combination of'aJ-key-head com prising two oppositelydisposedsheet-metal cup-like parts secured together; an opening in the lower oneof said parts; and a keystem having a resilient portion sprung into saidopening whereby said key-head is detachably secured to said sten1.']

16. The combination cf a key-sten and a key-head detachably sec tired tosaid stem, said key-head being p0; 'Jively and locked in position on saistem. i

17. The combinatior of a key-headv comprising a sheet-metal r art; and akey-stein, a portion of which detachably interlocks with saidsheet-metal part to positively lock said key-head in position on saidstem.

18. The combination of a key-stern having directly a spring portion, anda key-head having a part which detachably interlocks with said springp'ortion to positively lock said keyhead in position on said stem.

19.The combination of a key-stem and a key-head detachably mounted onsaid stern, said head being positivelylockedin position ilirelcltly onsaid stern by a spring-actuated ate Signed at the borough of Manhattan,city of New York, in the county of New York and State of New York, this8th day of May, A. D. 1902.

ARTHUR VV'. SMITH Witnesses:

K. V. DONOVAN, E. M. WELLS.-

